Handpiece of a cooling treatment system



FIG. 1 is an isometric view of a handpiece.

FIG. 2 is a front view of the handpiece of FIG. 1 .

FIG. 3 is a rear view of the handpiece of FIG. 1 .

FIG. 4 is a side view of the handpiece of FIG. 1 .

FIG. 5 is another side view of the handpiece of FIG. 1 .

FIG. 6 is another side view of the handpiece of FIG. 1 ; and,

FIG. 7 is another side view of the handpiece of FIG. 1 .

The broken lines indicate unclaimed portions of the handpiece that form no part of the claimed design. 

CLAIM The ornamental design for a handpiece of a cooling treatment system, as shown and described. 